The Lorentz motor is used to demonstrate Lorentz force which acts upon a currentcarrying conductor. The Lorentz motor armature consists of a coil with approx. 40 mm diameter and 3 turns. The ends of the coil are plugged into a coil mount, which can rotate freely on a shaft with an 8 mm diameter. A current can then flow continuously through the coil via the two slide contacts when the perceived axis through the coil is located almost perpendicularly to the magnetic field. The permanently attached connection leads are equipped with commercially available lab safety plugs with 4 mm diameter. In one of the leads there is also a series resistor with approx. 0.16 Ω (invisible) designed to limit the maximum motor current to such an extent as to avoid any disturbance to electronic control performed by standard power supplies.